Quote:
Originally Posted by crunch
Like I said, the built in exposure meter said I was underexposing by one third stop, but this could be user error. I'll try again later and see.
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I could see where this might actually be the case.
Consider two lenses, same focal length and aperture. One lens is "tack sharp" at that aperture, the other lens not quite so sharp. The lens having difficulty with sharpness is due to diffraction errors. The light IS getting thru, but it isn't falling where it should in the scene. (To block the stray light and fix the problem we "stop down"). The result here might be that the "overall scene" appears lighter because the "stray light" is falling across the entire scene. It would also have less clarity/contrast for the same reason.
Kind of like taking a picture with excess moisture in the air...things appear more washed out and "brighter" overall....